In this paper we evaluate the fea-sibility of seamless and efficient integration of terrestrial communication systems with satellite networks. This aspect is considered by standardisation bodies such as ETSI [1], 5G-PPP [2] and 3GPP [3]. A comprehensive system is designed and implemented in an emulation prototype, including standard 3GPP LTE core network functionality [4] with its different layers: networking, data forwarding, control, management and monitoring and is validated through performance measurements. This work is a technical feasibility study of extending terrestrial communication systems with satellite networks as backhaul, increas-ing the energy efficiency, network robustness during natural disasters as well as being an altative for peak-time data forwarding of the terrestrial communication services. Due to its global coverage property, terrestrial-satel-lite integration provides an obvious extension of communication services towards isolated and remote areas and an altative for rural or highly distributed/highly mobile enterprise networks.